147945817 has 4 divisors (see below), whose sum is σ = 148060836. Its totient is φ = 147830800.

The previous prime is 147945779. The next prime is 147945823. The reversal of 147945817 is 718549741.

It is a happy number.

147945817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44943616 + 103002201 = 6704^2 + 10149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147945817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147945877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55558 + ... + 58159.

It is an arithmetic number, because the mean of its divisors is an integer number (37015209).

Almost surely, 2^147945817 is an apocalyptic number.

It is an amenable number.

147945817 is a deficient number, since it is larger than the sum of its proper divisors (115019).

147945817 is a wasteful number, since it uses less digits than its factorization.

147945817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115018.

The product of its digits is 282240, while the sum is 46.

The square root of 147945817 is about 12163.2979491584. The cubic root of 147945817 is about 528.8926887361.

The spelling of 147945817 in words is "one hundred forty-seven million, nine hundred forty-five thousand, eight hundred seventeen".